IXPE polarization and photon counts versus time during Obs. 4. From top to bottom: Π_X, ψ_X, and count rates. Polarization results are from a time-resolved analysis with seven identical 19 ks time bins. The detection significance for each bin is displayed at the top of the figure. In the Π_X and ψ_X panels, dashed red lines denote a fit to a constant function; the shaded area corresponds to ≤3σ uncertainty. In addition, the solid blue and green lines indicate the best-fit result with the sinusoidal and multicomponent model, respectively. The dashed blue line in the light curve indicates the average value during the observation.